Wearable Microphone Chamber Geometry for Airflow Noise Reduction

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Solution Overview

Problem

Existing wearable electronic devices face challenges in optimizing the placement and design of microphones and speakers to enhance sound quality and reduce noise interference, particularly in compact form factors like in-ear earphones or hearing aids.

Innovation Solution

The design incorporates a housing with a chamber and grill structure that directs air flow to minimize noise interference, featuring a chamber with a convex surface and strategically positioned microphone holes to improve sound reception and output.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the microphone is placed close to the opening for better sound reception, then sound reception quality is improved, but noise interference from air flow increases

Engineering Contradiction:

Improvesound reception qualityVSAvoidnoise interference

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The chamber includes a first surface that is at least partially convex toward the opening, using a curved surface design to guide air flow away from the microphone area while maintaining proximity to the opening for optimal sound reception

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The hole is positioned in the second portion of the first surface, utilizing the three-dimensional convex geometry to create an optimized airflow path that separates the microphone's sound reception zone from the airflow path

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If the chamber is designed with a convex surface to direct air flow, then noise interference is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvenoise interferenceVSAvoidmanufacturing complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The convex first surface is designed with a curvature based on a portion of a spherical body formed by rotating an ellipse around a rotation axis, with the ellipse having an eccentricity within a specific range (0.65 to 0.9), providing a standardized geometric form that balances acoustic performance with manufacturability

Inventive Principle:

Principle #14Spheroidality (Curvature)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances sound quality by reducing noise interference and improving sound reception, particularly in noisy environments, while maintaining a compact form factor.

Implementation Method 1

a first surface that is at least partially convex toward the opening... The first direction may correspond to to a flow direction of air that flows along the surface of the housing

Methodology Applied

Scientific EffectAir flow:

Data Source

PatentUS20260025613A1Microphone and wearable electronic device comprising microphone

Publication Date: 2026.01.22 SAMSUNG ELECTRONICS CO LTD

AI summary

A wearable electronic device includes a housing including an opening in a surface thereof and a chamber defining a space facing the opening, a speaker inside the housing and configured to output sound toward a port at a position spaced apart from the opening, a grill at the opening, and a microphone configured to receive sound from outside the housing, where the chamber includes a first surface that is at least partially convex toward the opening and a hole at the first surface and configured to connect the space inside the chamber with the microphone.